Between brackets is the number of accepted species

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- Mollusca (132 754)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (24 992)
- Class Caudofoveata (143)
- Class Cephalopoda (1 832)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 679)
- Subclass Amphigastropoda † (387)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (53 623)
- Subclass Gastropoda incertae sedis (308)
- Subclass Heterobranchia (39 154)
- Infraclass "Lower Heterobranchia" (1 137)
- Infraclass Euthyneura (37 431)
- Subterclass Acteonimorpha (411)
- Superfamily Acteonoidea A. d'Orbigny, 1842 (332)
- Family Acteonidae A. d'Orbigny, 1842 (262)
- Genus Actaeon Ersch & Gruber, 1818 accepted as Acteon Montfort, 1810
- Subgenus Actaeon (Actaeonina) [sic] † accepted as Acteonina A. d'Orbigny, 1850 †
- Subgenus Actaeon (Buccinulus) Herrmannsen, 1852 accepted as Pupa Röding, 1798
- Subgenus Actaeon (Bulimactaeon) Cossmann, 1892 † accepted as Bulimactaeon Cossmann, 1892 †
- Subgenus Actaeon (Leucotina) A. Adams, 1860 accepted as Leucotina A. Adams, 1860
- Subgenus Actaeon (Lissactaeon) Monterosato, 1890 accepted as Lissactaeon Monterosato, 1890
- Subgenus Actaeon (Microglyphis) Dall, 1902 accepted as Microglyphis Dall, 1902
- Subgenus Actaeon (Nucleopsis) Conrad, 1865 † accepted as Nucleopsis Conrad, 1865 †
- Subgenus Actaeon (Rictaxis) Dall, 1871 accepted as Rictaxis Dall, 1871
- Subgenus Actaeon (Solidula) Fischer von Waldheim, 1807 accepted as Pupa Röding, 1798
- Subgenus Actaeon (Tornatellaea) Conrad, 1860 † accepted as Tornatellaea Conrad, 1860 †
- Species Actaeon aciculatum Cossmann, 1889 † accepted as Crenilabium aciculatum (Cossmann, 1889) †
- Species Actaeon acutissimus J. Müller, 1851 †
- Species Actaeon acutiusculus A. Braun, 1851 † accepted as Odostomia acutiuscula (A. Braun, 1851) †
- Species Actaeon aequatorialis Thiele, 1925 accepted as Acteon aequatorialis Thiele, 1925
- Species Actaeon aethiopicus E. von Martens, 1902 accepted as Acteon aethiopicus E. von Martens, 1902
- Species Actaeon amabilis R. B. Watson, 1883 accepted as Callostracon amabile (R. B. Watson, 1883)
- Species Actaeon andersoni Conrad, 1847 †
- Species Actaeon antarcticus Thiele, 1912 accepted as Acteon antarcticus Thiele, 1912
- Species Actaeon azoricus Locard, 1897 accepted as Inopinodon azoricus (Locard, 1897)
- Species Actaeon basteroti Benoist, 1889 †
- Species Actaeon bovetensis G. Seguenza, 1880 †
- Species Actaeon bulliformis J. Müller, 1851 †
- Species Actaeon chariis R. B. Watson, 1883 accepted as Callostracon chariis (R. B. Watson, 1883)
- Species Actaeon chipolanus Dall, 1896 †
- Species Actaeon cinereus R. B. Watson, 1884 accepted as Pupa affinis (A. Adams, 1855)
- Species Actaeon conicus Thiele, 1925 accepted as Acteon conicus Thiele, 1925
- Species Actaeon coniformis J. Müller, 1851 †
- Species Actaeon cratericulatus Hedley, 1906 accepted as Punctacteon cratericulatus (Hedley, 1906)
- Species Actaeon craticulatus Murdoch & Suter, 1906 accepted as Acteon (Maxacteon) cratericulatus (Hedley, 1906)
- Species Actaeon cubensis Gabb, 1873 † accepted as Acteon punctostriatus (C. B. Adams, 1840)
- Species Actaeon cumingii A. Adams, 1855 accepted as Mysouffa cumingii (A. Adams, 1855)
- Species Actaeon curtulus Dall, 1890 accepted as Microglyphis curtula (Dall, 1890)
- Species Actaeon cylindraceus J. Müller, 1851 †
- Species Actaeon danaida Dall, 1881 accepted as Acteon danaida Dall, 1881
- Species Actaeon degrangei Benoist, 1889 †
- Species Actaeon delicatus Dall, 1889 accepted as Acteon delicatus Dall, 1889
- Species Actaeon dianae A. Adams, 1855 accepted as Leucotina casta (A. Adams, 1853)
- Species Actaeon distinguendus Cossmann, 1897 † accepted as Acteon distinguendus (Cossmann, 1897) †
- Species Actaeon doliolum J. Müller, 1851 †
- Species Actaeon edentula R. B. Watson, 1883 accepted as Neactaeonina edentula (R. B. Watson, 1883)
- Species Actaeon etheridgii A. Bell, 1870 accepted as Crenilabium exile (Jeffreys, 1870)
- Species Actaeon evanescens Cossmann, 1897 † accepted as Acteon evanescens (Cossmann, 1897) †
- Species Actaeon flammea [sic] accepted as Punctacteon flammeus (Gmelin, 1791)
- Species Actaeon flammeus (Gmelin, 1791) accepted as Punctacteon flammeus (Gmelin, 1791)
- Species Actaeon fortis Thiele, 1925 accepted as Acteon fortis Thiele, 1925
- Species Actaeon fragilis Thiele, 1925 accepted as Acteon fragilis Thiele, 1925
- Species Actaeon funiculifer Cossmann, 1897 † accepted as Acteon funiculifer (Cossmann, 1897) †
- Species Actaeon gardneri Cossmann, 1889 † accepted as Acteon gardneri (Cossmann, 1889) †
- Species Actaeon gilberti Cossmann, 1889 † accepted as Acteon gilberti (Cossmann, 1889) †
- Species Actaeon gmelini Bayan, 1870 † accepted as Acteon gmelini (Bayan, 1870) †
- Species Actaeon grimaldii Dautzenberg & H. Fischer, 1896 accepted as Mysouffa turrita (R. B. Watson, 1883)
- Species Actaeon hebes A. E. Verrill, 1885 accepted as Acteon hebes A. E. Verrill, 1885
- Species Actaeon hopei Vérany, 1853 accepted as Thuridilla hopei (Vérany, 1853)
- Species Actaeon houdasi Cossmann, 1907 † accepted as Acteon houdasi (Cossmann, 1907) †
- Species Actaeon javanus K. Martin, 1884 † accepted as Acteon javanus (K. Martin, 1884) †
- Species Actaeon laetus Thiele, 1925 accepted as Acteon laetus Thiele, 1925
- Species Actaeon lawsoni C. E. Weaver, 1905 †
- Species Actaeon levidensis S. V. Wood, 1848 † accepted as Acteon levidensis S. V. Wood, 1848 †
- Species Actaeon maltzani Dautzenberg, 1910 accepted as Acteon maltzani Dautzenberg, 1910
- Species Actaeon mariae A. Adams, 1855 accepted as Acteon mariae A. Adams, 1855
- Species Actaeon melampoides Dall, 1881 accepted as Acteon melampoides Dall, 1881
- Species Actaeon modestus A. Adams, 1855 accepted as Acteon modestus A. Adams, 1855
- Species Actaeon modestus Thiele, 1925 accepted as Acteon modestus Thiele, 1925
- Species Actaeon monterosatoi Dautzenberg, 1889 accepted as Acteon monterosatoi Dautzenberg, 1889
- Species Actaeon morelletorum Gougerot & Braillon, 1968 † accepted as Acteon morelletorum (Gougerot & Braillon, 1968) †
- Species Actaeon moulinsii Benoist, 1889 †
- Species Actaeon neglectus Benoist, 1889 †
- Species Actaeon nitidus A. E. Verrill, 1882 accepted as Crenilabium exile (Jeffreys, 1870)
- Species Actaeon noae J. De C. Sowerby, 1823 † accepted as Acteon noae J. De C. Sowerby, 1823 †
- Species Actaeon oblongus Menke, 1854
- Species Actaeon orthezi Benoist, 1889 †
- Species Actaeon ovatus Jeffreys, 1880 accepted as Inopinodon azoricus (Locard, 1897)
- Species Actaeon oviformis Kaunhowen, 1898 †
- Species Actaeon papyraceus Benoist, 1889 †
- Species Actaeon parvulus Benoist, 1889 †
- Species Actaeon parvum Dickerson, 1917 †
- Species Actaeon paulensis Benoist, 1889 †
- Species Actaeon perconicus Dall, 1890 accepted as Microglyphis perconica (Dall, 1890)
- Species Actaeon perforatus Dall, 1881 accepted as Acteon perforatus Dall, 1881
- Species Actaeon pilsbryi Cossmann, 1902 accepted as Pupa affinis (A. Adams, 1855)
- Species Actaeon praestitus H. J. Finlay, 1924 † accepted as Tenuiactaeon ambiguus (F. W. Hutton, 1885) †
- Species Actaeon pudicus A. Adams, 1855 accepted as Acteon pudicus A. Adams, 1855
- Species Actaeon pulchrior Melvill, 1904 accepted as Gurmatia pulchrior (Melvill, 1904)
- Species Actaeon puteolata Pritchard, 1896 † accepted as Odostomia puteolata (Pritchard, 1896) †
- Species Actaeon reevei E. A. Smith, 1893
- Species Actaeon reticulatus K. Martin, 1884 † accepted as Pupa reticulata (K. Martin, 1884) †
- Species Actaeon reussi K. Martin, 1879 † accepted as Pupa reussi (K. Martin, 1879) †
- Species Actaeon reussi O. Boettger, 1902 †
- Species Actaeon ringei Strebel, 1905 accepted as Lanayrella ringei (Strebel, 1905)
- Species Actaeon roseus Hedley, 1906 accepted as Acteon roseus Hedley, 1906
- Species Actaeon salinensis Benoist, 1889 †
- Species Actaeon saucatsensis Benoist, 1889 †
- Species Actaeon scalariformis Benoist, 1889 †
- Species Actaeon scrobiculatus Tenison Woods, 1877 † accepted as Acteon scrobiculatus Tenison Woods, 1877 †
- Species Actaeon secale A. Gould, 1859 accepted as Acteon secale A. Gould, 1859
- Species Actaeon semilaevis Ortmann, 1900 †
- Species Actaeon semisculptus E. A. Smith, 1890 accepted as Acteon semisculptus E. A. Smith, 1890
- Species Actaeon senegalensis Maltzan, 1885 accepted as Acteon maltzani Dautzenberg, 1910
- Species Actaeon siogamensis Nomura, 1939 † accepted as Japonactaeon nipponensis (Yamakawa, 1911)
- Species Actaeon souverbiei Benoist, 1889 †
- Species Actaeon staszycii Zeuschner, 1849 † accepted as Endoplocus staszycii (Zeuschner, 1849) †
- Species Actaeon subcylindricus Kaunhowen, 1898 †
- Species Actaeon subpunctulatus O. Boettger, 1902 †
- Species Actaeon subscalatus Cossmann, 1897 † accepted as Acteon subscalatus (Cossmann, 1897) †
- Species Actaeon subulatus S. V. Wood, 1848 † accepted as Acteon tornatilis (Linnaeus, 1758)
- Species Actaeon tornatilis (Linnaeus, 1758) accepted as Acteon tornatilis (Linnaeus, 1758)
- Species Actaeon turritus R. B. Watson, 1883 accepted as Tomlinula turrita (R. B. Watson, 1883)
- Genus Actaeonidea Gabb, 1873 † accepted as Rictaxis Dall, 1871
- Genus Actaeonina [sic] † accepted as Acteonina A. d'Orbigny, 1850 †
- Genus Acteon Montfort, 1810 (126)
- Genus Acteonina A. d'Orbigny, 1850 † (3)
- Genus Bathyacteon Á. Valdés, 2008 accepted as Metactaeon Thiele, 1931
- Genus Buccinulus Herrmannsen, 1852 accepted as Pupa Röding, 1798
- Genus Bulimactaeon Cossmann, 1892 † (1)
- Genus Callostracon sensu F. Nordsieck, 1972 accepted as Callostracon Repetto & Bianco, 2012
- Genus Callostracon Repetto & Bianco, 2012 (3)
- Genus Colostracon Hamlin, 1884 † (1)
- Genus Crenilabium Cossmann, 1889 (15)
- Genus Crenilabrum accepted as Crenilabium Cossmann, 1889
- Genus Dactylus Schumacher, 1817 accepted as Pupa Röding, 1798
- Genus Eoacteon L. W. Stephenson, 1955 † accepted as Crenilabium Cossmann, 1889
- Genus Fortisia Bayan, 1870 † accepted as Liocarenus G. F. Harris & Burrows, 1891 †
- Genus Hemiauricula Deshayes, 1853 † (2)
- Genus Inopinodon Bouchet, 1975 (1)
- Genus Japanacteon [sic] accepted as Japonactaeon Is. Taki, 1956
- Genus Japonactaeon Is. Taki, 1956 (12)
- Genus Japonacteon [sic] accepted as Japonactaeon Is. Taki, 1956
- Genus Lanayrella Salvador & C. Cunha, 2020 (2)
- Genus Liocarenus G. F. Harris & Burrows, 1891 † accepted as Hemiauricula Deshayes, 1853 † (1)
- Genus Lissactaeon Monterosato, 1890 accepted as Crenilabium Cossmann, 1889
- Genus Maxacteon Rudman, 1971 accepted as Punctacteon Kuroda & Habe, 1961
- Genus Metactaeon Thiele, 1931 (2)
- Genus Mysouffa Ev. Marcus, 1974 (2)
- Genus Neactaeonina Thiele, 1912 (6)
- Genus Neoacteonina [sic] accepted as Neactaeonina Thiele, 1912
- Genus Nucleopsis Conrad, 1865 † (1)
- Genus Obrussa Iredale, 1925 accepted as Obrussena Iredale, 1930
- Genus Obrussena Iredale, 1930 (3)
- Genus Ongleya H. J. Finlay & Marwick, 1937 † (1)
- Genus Ovactaeonina Cossmann, 1895 † (3)
- Genus Ovulactaeon Dall, 1889 (2)
- Genus Pitharella F. E. Edwards, 1860 † (1)
- Genus Pseudactaeon Thiele, 1925
- Genus Punctacteon Kuroda & Habe, 1961 (15)
- Genus Pupa Röding, 1798 (23)
- Genus Rapturella Salvador & C. Cunha, 2016 (3)
- Genus Ravniella Rosenkrantz, 1970 † (1)
- Genus Rictaxis Dall, 1871 (7)
- Genus Semiactaeon Cossmann, 1889 †
- Genus Solidula Fischer von Waldheim, 1807 accepted as Pupa Röding, 1798
- Genus Speo Risso, 1826 accepted as Acteon Montfort, 1810
- Genus Strigopupa Habe, 1958 accepted as Pupa Röding, 1798
- Genus Tenuiactaeon Aldrich, 1921 † (2)
- Genus Tornatella Lamarck, 1816 accepted as Acteon Montfort, 1810 (1)
- Genus Tornatellaea Conrad, 1860 † (14)
- Genus Tornatellaeinae Bandel & Dockery, 2016 † accepted as Acteonidae A. d'Orbigny, 1842
- Genus Triploca Tate, 1894 (2)
- Genus Volvaria Lamarck, 1801 † (5)
- Genus Volvariella P. Fischer, 1883 † accepted as Volvaria (Volvariella) P. Fischer, 1883 †
- Genus Wangacteon Stilwell, 1993 † (1)
- Family Aplustridae Gray, 1847 (43)
- Family Bullinidae Gray, 1850 accepted as Aplustridae Gray, 1847
- Family Cylindrobullinidae Wenz, 1938 † (18)
- Family Hydatinidae Pilsbry, 1895 accepted as Aplustridae Gray, 1847
- Family Nonacteoninidae Bandel, 1994 † accepted as Aplustridae Gray, 1847 (1)
- Family Pupidae Kuroda, 1941 accepted as Acteonidae A. d'Orbigny, 1842
- Family Solidulidae Meek & Hayden, 1860 accepted as Acteonidae A. d'Orbigny, 1842
- Family Sulcoactaeonidae Gründel, 1997 † accepted as Aplustridae Gray, 1847
- Family Tornatellidae J. Fleming, 1828 accepted as Acteonidae A. d'Orbigny, 1842
- Family Tubiferidae Cossmann, 1895 † (8)
- Family Zardinellidae Bandel, 1994 †
- Superfamily Rissoelloidea Gray, 1850 (79)
- Subterclass Ringipleura (2 917)
- Subterclass Tectipleura (34 103)
- Superorder Euthyneura incertae sedis
- Infraclass Heterobranchia incertae sedis (478)
- Infraclass Mesoneura (108)
- Infraclass Opisthobranchia
- Infraclass Pulmonata
- Subclass Neomphaliones accepted as Vetigastropoda
- Subclass Neritimorpha (1 914)
- Subclass Orthogastropoda represented as Gastropoda
- Subclass Patellogastropoda (511)
- Subclass Prosobranchia
- Subclass Psilogastropoda represented as Gastropoda
- Subclass Vetigastropoda (6 782)
- Class Lamellibranchiata accepted as Bivalvia
- Class Loricata accepted as Polyplacophora
- Class Mollusca incertae sedis † (372)
- Class Monoplacophora (229)
- Class Pelecypoda accepted as Bivalvia
- Class Polyplacophora (1 377)
- Class Polyplaxiphora accepted as Polyplacophora
- Class Rostroconchia † (64)
- Class Scaphopoda (752)
- Class Solenoconchia accepted as Scaphopoda
- Class Solenogastres (313)
- Subclass Chaetodermomorpha accepted as Caudofoveata